SU1252815A1 - Displaying device - Google Patents

Abstract

The invention relates to the field of radio electronics and can be used in information display devices of computer control panels and automated systems for various purposes. The purpose of the invention is to increase the reliability of information that is achieved by the introduction of a comparison unit and the second element OR. And functional links. During the action of the pulses from the pulse generator, the health of the indicator elements and their control circuits is monitored. In the presence of a fault, the signal. The light from the pulse former through the second element OR arrives at the control units, unlocks them, causes all the indicator elements to light up and blocks the flow of information signals. A pulse from another output of the former through the first element OR enters the control units and periodically extinguishes the indicator elements, causing them to blink. In the diagnostic mode, the glow of all spark indicators alternates with their damping, the blinking frequency is determined by the frequency of the pulse generator, the non-bright indicator is faulty and blocked by a signal applied to the self-control input. 2 Il. (Lu Yu SP 00

Description

one

The invention relates to radio electronics and can be used in information display devices (CIO) of computer control panels and automated systems for various purposes, in information boards and other electronic equipment.

The purpose of the invention is to increase the reliability of the displayed information.

FIG. 1 shows a functional diagram of the proposed device; FIG. 2 - timing diagrams for devices that work.

The device contains control blocks 1, indicator elements 2, power bus 3, information source 4, comparison block 5, pulse generator 6, pulse shaper 7, trigger 8, first 9 and second 10 elements AND, switch-off input 11 self-monitoring, first 12 and second 13 elements OR.

The pulse generator 6 generates pulses, the duration of which is sufficient to ensure the response of the driver 7 of the control signals, and the follow-up period is of the order of a second. During the operation of these pulses, the health of the indicator elements 2 and the control circuits of the indicator elements is monitored. In case of their serviceability, the device switches to the indication mode, in which the state of the indicator elements 2 is determined by signals from the information source 4 to the inputs of the control units 1. Since the duration of the pulses of the generator 6 is chosen short, the state of the indicator elements 2 due to their inertia does not change during the operation of these pulses and is determined by the signals from the source 4 of information.

The pulses from the output of the generator 6 are fed to the counting input of the trigger 8, which in turn permits the passage of the pulses of the generator 6 to the outputs of the And 9 and 10 elements and then through the elements of the WIG 12 and 13 to the corresponding inputs of the control blocks 1.

The presence of pulses on one input of control unit 1 causes the extinguishing of all indicator elements 2 and the occurrence, if they are operational, of a logical 1 state on the other outputs of control unit 1 connected to

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one of the inputs of block 5 comparison. The other input of the comparison unit 5 at this time receives a logical 1 signal from the first output of the trigger 8.

The presence of pulses at other inputs of control unit 1 causes all indicator elements 2 to glow and, if they are in good condition, the logical O state at other outputs of control unit 1 connected to one input of comparison unit 5. The other input of the comparison unit 5 at this time receives a logical O signal from the first output of the trigger 8.

Comparison unit 5 provides a comparison of each of the signals arriving at one input (signals from other outputs of control unit 1) with a signal arriving at another input (signal from the first output of trigger 8), and if they do not match, at the output of comparison unit 5 signal corresponding to the logical 1.

If there are pulses on other inputs of the control unit 1, if there is an open circuit in the control circuit of the indicator elements or a short circuit in the circuit of the indicator elements, in the corresponding circuit on. the first input of the comparison unit 5 receives a logical 1 signal, which also causes the appearance of a logical 1 at the output of the comparison unit 5.

The signal of logical 1 in the presence of a malfunction, from the output of the comparator unit 5 is fed to the second input of the control signal generator 7 and on the falling edge of the generator 6 pulses fed to the first input of the signal generator 7 causes the appearance of control signals

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Light and Quenching at its entrances. The Zasvet signal from the second output of the signal conditioner 7 goes through the second element OR 13 to the other inputs of the control units 1 and unlocks them, causing all the indicator elements 2 to glow and blocks the signals from the information source 4. Control (impulse) signal The blanking from the first output of the signal conditioner 7 through the OR 12 element enters the corresponding inputs of the control units 1 and periodically quenches the indicator elements 2, causing flashing.

The display device switches to the diagnostic mode, with which the illumination of all serviceable indicators alternates with their quenching. The blink frequency is determined by the frequency of the 6-pulse generator. Non-luminous indicator element is faulty.

If it is necessary to continue work with a faulty indicator, it is necessary to send a blocking signal to the input 11 of the disconnecting self-control. In this case, the Light signal from the first output of the driver 7 of the control signals is blocked, and information from the source of information is indicated on the indicator elements in blinking mode.

Claims (1)

Invention Formula A display device containing control units, one outputs of which are connected to indicator elements connected to the power bus, an impulse generator, the output of which is connected to the first input of the pulse shaper, the trigger input and the first inputs of the AND elements, the first OR element, the first the input of which is connected to the output of the first element I, the second input to the first output of the pulse former, the output to one input of the control units, the first output of the trigger is connected to the second input of the first element I, the second output to the second input of the second element AND, characterized in that, in order to increase the reliability of the displayed information, it contains a comparison unit and a second OR element, the first input of which is connected to the output of the second AND element, the second input to the second output of the pulse former, to the other the inputs of the control units, some of the outputs of the comparison unit group are connected to other outputs of the control units, the output is connected to the second input of the pulse former, the first output of the trigger is connected to the input of the comparison unit.